part: Drop disk_partition_t typedef

We should not be using typedefs and these make it harder to use
forward declarations (to reduce header file inclusions). Drop the typedef.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/lib/efi_loader/efi_file.c b/lib/efi_loader/efi_file.c
index 140116d..1fe7cf5 100644
--- a/lib/efi_loader/efi_file.c
+++ b/lib/efi_loader/efi_file.c
@@ -634,7 +634,7 @@
 		utf8_utf16_strcpy(&dst, filename);
 	} else if (!guidcmp(info_type, &efi_file_system_info_guid)) {
 		struct efi_file_system_info *info = buffer;
-		disk_partition_t part;
+		struct disk_partition part;
 		efi_uintn_t required_size;
 		int r;